Audubon Society of Portland's School of Birding is a series of classes and field trips helping people discover the art of birding in the Pacific Northwest.
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Saturday, March 19, 2011
UV identifies gender
Chickadees can identify gender by UV differences. Because birds can see UV light and we can't, decals and other window treatments can deter birds from fatally crashing into windows while not obstructing your view.
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